Symbol * Symbol::GetFuncScopeVarSym() const
{
if (!this->GetIsBlockVar())
{
return nullptr;
}
FuncInfo * parentFuncInfo = this->GetScope()->GetFunc();
if (parentFuncInfo->GetIsStrictMode())
{
return nullptr;
}
Symbol *fncScopeSym = parentFuncInfo->GetBodyScope()->FindLocalSymbol(this->GetName());
if (fncScopeSym == nullptr && parentFuncInfo->GetParamScope() != nullptr)
{
// We couldn't find the sym in the body scope, try finding it in the parameter scope.
fncScopeSym = parentFuncInfo->GetParamScope()->FindLocalSymbol(this->GetName());
}
Assert(fncScopeSym);
// Parser should have added a fake var decl node for block scoped functions in non-strict mode
// IsBlockVar() indicates a user let declared variable at function scope which
// shadows the function's var binding, thus only emit the var binding init if
// we do not have a block var symbol.
if (!fncScopeSym || fncScopeSym->GetIsBlockVar())
{
return nullptr;
}
return fncScopeSym;
}
Symbol * Symbol::GetFuncScopeVarSym() const
{
if (!this->GetIsBlockVar())
{
return nullptr;
}
FuncInfo * parentFuncInfo = this->GetScope()->GetFunc();
if (parentFuncInfo->GetIsStrictMode())
{
return nullptr;
}
Symbol *fncScopeSym = parentFuncInfo->GetBodyScope()->FindLocalSymbol(this->GetName());
if (fncScopeSym == nullptr && parentFuncInfo->GetParamScope() != nullptr)
{
// We couldn't find the sym in the body scope, try finding it in the parameter scope.
Scope* paramScope = parentFuncInfo->GetParamScope();
fncScopeSym = paramScope->FindLocalSymbol(this->GetName());
if (fncScopeSym == nullptr)
{
FuncInfo* parentParentFuncInfo = paramScope->GetEnclosingScope()->GetFunc();
if (parentParentFuncInfo->root->sxFnc.IsAsync())
{
// In the case of async functions the func-scope var sym might have
// come from the parent function parameter scope due to the syntax
// desugaring implementation of async functions.
fncScopeSym = parentParentFuncInfo->GetBodyScope()->FindLocalSymbol(this->GetName());
if (fncScopeSym == nullptr)
{
fncScopeSym = parentParentFuncInfo->GetParamScope()->FindLocalSymbol(this->GetName());
}
}
}
}
Assert(fncScopeSym);
// Parser should have added a fake var decl node for block scoped functions in non-strict mode
// IsBlockVar() indicates a user let declared variable at function scope which
// shadows the function's var binding, thus only emit the var binding init if
// we do not have a block var symbol.
if (!fncScopeSym || fncScopeSym->GetIsBlockVar())
{
return nullptr;
}
return fncScopeSym;
}